diff --git a/drivers/src/main/java/org/onosproject/driver/extensions/NiciraExtensionSelectorInterpreter.java b/drivers/src/main/java/org/onosproject/driver/extensions/NiciraExtensionSelectorInterpreter.java
new file mode 100644
index 0000000..b1a3c68
--- /dev/null
+++ b/drivers/src/main/java/org/onosproject/driver/extensions/NiciraExtensionSelectorInterpreter.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onosproject.driver.extensions;
+
+import org.onosproject.net.behaviour.ExtensionSelectorResolver;
+import org.onosproject.net.driver.AbstractHandlerBehaviour;
+import org.onosproject.net.flow.criteria.ExtensionSelector;
+import org.onosproject.net.flow.criteria.ExtensionSelectorType;
+import org.onosproject.openflow.controller.ExtensionSelectorInterpreter;
+import org.projectfloodlight.openflow.protocol.OFFactory;
+import org.projectfloodlight.openflow.protocol.oxm.OFOxm;
+
+/**
+ * Interpreter for Nicira OpenFlow selector extensions.
+ */
+public class NiciraExtensionSelectorInterpreter
+        extends AbstractHandlerBehaviour
+        implements ExtensionSelectorInterpreter, ExtensionSelectorResolver {
+
+    @Override
+    public boolean supported(ExtensionSelectorType extensionSelectorType) {
+        return false;
+    }
+
+    @Override
+    public OFOxm<?> mapSelector(OFFactory factory, ExtensionSelector extensionSelector) {
+        return null;
+    }
+
+    @Override
+    public ExtensionSelector mapOxm(OFOxm<?> oxm) {
+        return null;
+    }
+
+    @Override
+    public ExtensionSelector getExtensionSelector(ExtensionSelectorType type) {
+        return null;
+    }
+}
diff --git a/drivers/src/main/java/org/onosproject/driver/extensions/NiciraExtensionTreatmentInterpreter.java b/drivers/src/main/java/org/onosproject/driver/extensions/NiciraExtensionTreatmentInterpreter.java
index 2297906..bfca861 100644
--- a/drivers/src/main/java/org/onosproject/driver/extensions/NiciraExtensionTreatmentInterpreter.java
+++ b/drivers/src/main/java/org/onosproject/driver/extensions/NiciraExtensionTreatmentInterpreter.java
@@ -31,7 +31,7 @@
 import org.projectfloodlight.openflow.types.IPv4Address;
 
 /**
- * Interpreter for Nicira OpenFlow extensions.
+ * Interpreter for Nicira OpenFlow treatment extensions.
  */
 public class NiciraExtensionTreatmentInterpreter extends AbstractHandlerBehaviour
         implements ExtensionTreatmentInterpreter, ExtensionTreatmentResolver {
diff --git a/drivers/src/main/java/org/onosproject/driver/extensions/NiciraResubmit.java b/drivers/src/main/java/org/onosproject/driver/extensions/NiciraResubmit.java
index 481b6f9..b85af4f 100644
--- a/drivers/src/main/java/org/onosproject/driver/extensions/NiciraResubmit.java
+++ b/drivers/src/main/java/org/onosproject/driver/extensions/NiciraResubmit.java
@@ -19,7 +19,8 @@
 import com.google.common.base.MoreObjects;
 import org.onlab.util.KryoNamespace;
 import org.onosproject.net.PortNumber;
-import org.onosproject.net.flow.instructions.AbstractExtensionTreatment;
+import org.onosproject.net.flow.AbstractExtension;
+import org.onosproject.net.flow.instructions.ExtensionTreatment;
 import org.onosproject.net.flow.instructions.ExtensionTreatmentType;
 import org.onosproject.store.serializers.PortNumberSerializer;
 
@@ -30,7 +31,7 @@
 /**
  * Nicira resubmit extension instruction.
  */
-public class NiciraResubmit extends AbstractExtensionTreatment {
+public class NiciraResubmit extends AbstractExtension implements ExtensionTreatment  {
 
     private PortNumber inPort;
 
diff --git a/drivers/src/main/java/org/onosproject/driver/extensions/NiciraResubmitTable.java b/drivers/src/main/java/org/onosproject/driver/extensions/NiciraResubmitTable.java
index 3c8dd0c..4743d21 100644
--- a/drivers/src/main/java/org/onosproject/driver/extensions/NiciraResubmitTable.java
+++ b/drivers/src/main/java/org/onosproject/driver/extensions/NiciraResubmitTable.java
@@ -20,7 +20,8 @@
 
 import org.onlab.util.KryoNamespace;
 import org.onosproject.net.PortNumber;
-import org.onosproject.net.flow.instructions.AbstractExtensionTreatment;
+import org.onosproject.net.flow.AbstractExtension;
+import org.onosproject.net.flow.instructions.ExtensionTreatment;
 import org.onosproject.net.flow.instructions.ExtensionTreatmentType;
 import org.onosproject.store.serializers.PortNumberSerializer;
 
@@ -33,7 +34,8 @@
 /**
  * Nicira resubmit-table extension instruction.
  */
-public class NiciraResubmitTable extends AbstractExtensionTreatment {
+public class NiciraResubmitTable extends AbstractExtension implements
+        ExtensionTreatment {
 
     //the list of the in port number(PortNumber) and the table(short)
     private List<Object> inPortAndTable = new ArrayList<Object>();
@@ -109,4 +111,4 @@
         return MoreObjects.toStringHelper(getClass())
                 .add("inPortAndTable", inPortAndTable).toString();
     }
-}
\ No newline at end of file
+}
diff --git a/drivers/src/main/java/org/onosproject/driver/extensions/NiciraSetNshContextHeader.java b/drivers/src/main/java/org/onosproject/driver/extensions/NiciraSetNshContextHeader.java
index 0aa0f4d..c826798 100644
--- a/drivers/src/main/java/org/onosproject/driver/extensions/NiciraSetNshContextHeader.java
+++ b/drivers/src/main/java/org/onosproject/driver/extensions/NiciraSetNshContextHeader.java
@@ -16,18 +16,19 @@
 
 package org.onosproject.driver.extensions;
 
-import java.util.Objects;
-
+import com.google.common.base.MoreObjects;
 import org.onlab.util.KryoNamespace;
-import org.onosproject.net.flow.instructions.AbstractExtensionTreatment;
+import org.onosproject.net.flow.AbstractExtension;
+import org.onosproject.net.flow.instructions.ExtensionTreatment;
 import org.onosproject.net.flow.instructions.ExtensionTreatmentType;
 
-import com.google.common.base.MoreObjects;
+import java.util.Objects;
 
 /**
  * Nicira set NSH Context header extension instruction.
  */
-public class NiciraSetNshContextHeader extends AbstractExtensionTreatment {
+public class NiciraSetNshContextHeader extends AbstractExtension implements
+        ExtensionTreatment {
 
     private int nshCh;
     private ExtensionTreatmentType type;
diff --git a/drivers/src/main/java/org/onosproject/driver/extensions/NiciraSetNshSi.java b/drivers/src/main/java/org/onosproject/driver/extensions/NiciraSetNshSi.java
index 53cf629..1480508 100644
--- a/drivers/src/main/java/org/onosproject/driver/extensions/NiciraSetNshSi.java
+++ b/drivers/src/main/java/org/onosproject/driver/extensions/NiciraSetNshSi.java
@@ -16,18 +16,19 @@
 
 package org.onosproject.driver.extensions;
 
-import java.util.Objects;
-
+import com.google.common.base.MoreObjects;
 import org.onlab.util.KryoNamespace;
-import org.onosproject.net.flow.instructions.AbstractExtensionTreatment;
+import org.onosproject.net.flow.AbstractExtension;
+import org.onosproject.net.flow.instructions.ExtensionTreatment;
 import org.onosproject.net.flow.instructions.ExtensionTreatmentType;
 
-import com.google.common.base.MoreObjects;
+import java.util.Objects;
 
 /**
  * Nicira set NSH SI extension instruction.
  */
-public class NiciraSetNshSi extends AbstractExtensionTreatment {
+public class NiciraSetNshSi extends AbstractExtension implements
+        ExtensionTreatment {
 
     private byte nshSi;
 
diff --git a/drivers/src/main/java/org/onosproject/driver/extensions/NiciraSetNshSpi.java b/drivers/src/main/java/org/onosproject/driver/extensions/NiciraSetNshSpi.java
index 1a168d0..1a47173 100644
--- a/drivers/src/main/java/org/onosproject/driver/extensions/NiciraSetNshSpi.java
+++ b/drivers/src/main/java/org/onosproject/driver/extensions/NiciraSetNshSpi.java
@@ -16,18 +16,19 @@
 
 package org.onosproject.driver.extensions;
 
-import java.util.Objects;
-
+import com.google.common.base.MoreObjects;
 import org.onlab.util.KryoNamespace;
-import org.onosproject.net.flow.instructions.AbstractExtensionTreatment;
+import org.onosproject.net.flow.AbstractExtension;
+import org.onosproject.net.flow.instructions.ExtensionTreatment;
 import org.onosproject.net.flow.instructions.ExtensionTreatmentType;
 
-import com.google.common.base.MoreObjects;
+import java.util.Objects;
 
 /**
  * Nicira set NSH SPI extension instruction.
  */
-public class NiciraSetNshSpi extends AbstractExtensionTreatment {
+public class NiciraSetNshSpi extends AbstractExtension implements
+        ExtensionTreatment {
 
     private int nshSpi;
 
diff --git a/drivers/src/main/java/org/onosproject/driver/extensions/NiciraSetTunnelDst.java b/drivers/src/main/java/org/onosproject/driver/extensions/NiciraSetTunnelDst.java
index ec23a9e..e28a1e2 100644
--- a/drivers/src/main/java/org/onosproject/driver/extensions/NiciraSetTunnelDst.java
+++ b/drivers/src/main/java/org/onosproject/driver/extensions/NiciraSetTunnelDst.java
@@ -19,7 +19,8 @@
 import com.google.common.base.MoreObjects;
 import org.onlab.packet.Ip4Address;
 import org.onlab.util.KryoNamespace;
-import org.onosproject.net.flow.instructions.AbstractExtensionTreatment;
+import org.onosproject.net.flow.AbstractExtension;
+import org.onosproject.net.flow.instructions.ExtensionTreatment;
 import org.onosproject.net.flow.instructions.ExtensionTreatmentType;
 import org.onosproject.store.serializers.Ip4AddressSerializer;
 
@@ -30,7 +31,8 @@
 /**
  * Nicira set tunnel destination extension instruction.
  */
-public class NiciraSetTunnelDst extends AbstractExtensionTreatment {
+public class NiciraSetTunnelDst extends AbstractExtension implements
+        ExtensionTreatment {
 
     private Ip4Address tunnelDst;